My years may be off but did this year chiller have the black box guard pak controller??? I remember a SB that came out after I found a guard pak nusance tripping on compressor contactor pull in, creating an electrical inrush that tripped the guard pak. Ended up being a guard pak design flaw and had to replace all guard paks of that vintage. Same situation I got a hotel, lawn chair, 20 meters and 100 tattletales and watched this chiller for 3 days straight before I finally caught it in action. It was tripping but no safeties were telling it to the second the compressor contactor was engaged.